Box beam level



FIG. 1 is an isometric view of a box beam level incorporating our new design, wherein the portions in phantom form no part of the claimed design;

FIG. 2 is a first side elevation view thereof;

FIG. 3 is a second side elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a first end elevation view thereof; and,

FIG. 7 is a second end elevation view thereof. 

CLAIM The ornamental design of a box beam level, as shown and described. 